# Issue with firmware level

**URL:** <https://forum.quantasylum.com/t/issue-with-firmware-level/1411>\
**Category:** QA40x\
**Created:** [May 26, 2024, 5:18pm UTC](https://forum.quantasylum.com/t/issue-with-firmware-level/1411 "2024-05-26T17:18:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bski](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bski](https://forum.quantasylum.com/u/bski)\
**Post date:** [May 26, 2024, 5:18pm UTC](https://forum.quantasylum.com/t/issue-with-firmware-level/1411/1 "2024-05-26T17:18:04Z")

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Hello,

I loaned by QA403 to a friend who upgraded the firmware accidentally to level 60.

The Frequency Response function no longer works with error " FFT too small".

When I try to go back to firmware 59 via either 1.197 or 1.199, I get the error:

“Flash Failed An Exception was caught”

Any thoughts on what to try? Needing to measure a new preamp today and unable to do so.

Thanks.

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<div class="post-metadata">

**Author:** ![bski](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bski](https://forum.quantasylum.com/u/bski)\
**Post date:** [May 26, 2024, 5:56pm UTC](https://forum.quantasylum.com/t/issue-with-firmware-level/1411/2 "2024-05-26T17:56:52Z")

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Well, I switched to another Windows machine and was able to get the firmware to revert.

Got the fft sizing to work.

Sorry for the bother.